Novel puncture-resistant combined outsole structure

Abstract

The utility model discloses a novel anti-puncture combined outsole structure which comprises a foaming midsole and a rubber outsole, a Kevlar anti-puncture layer is arranged between the foaming midsole and the rubber outsole, a layer of heat insulation cotton is adhered to the upper surface and / or the lower surface of the Kevlar anti-puncture layer, the thickness of the rubber outsole is 3-5mm, the thickness of the Kevlar anti-puncture layer is 2.3-3.0 mm, and the thickness of the rubber outsole is 3-5mm. The thickness of the heat insulation cotton is 0.5-1.0 mm, and the thickness of the foaming insole is 5-8 mm. The novel outsole structure is applied to the safety shoes, the experience discomfort caused by hardness and toughness of the sole in the original structure is overcome, the comfort of the safety shoes is greatly improved, and the novel outsole structure has a good anti-puncture effect, is simple in production method, easy to operate, high in practicability and suitable for mass production and use and has a good market prospect.

Description

[0001] A novel puncture-resistant composite outsole structure Technical Field

[0002] This utility model belongs to the field of shoemaking technology, specifically relating to a novel puncture-resistant composite outsole structure and its production method. Background Technology

[0003] Puncture-resistant safety shoes must meet certain standards, such as a puncture resistance greater than 1100N, to ensure sufficient protection in practical use. Puncture-resistant safety shoes primarily rely on incorporating a puncture-resistant midsole or steel plate in the midsole above the sole. These materials effectively defend against punctures from sharp objects, thus protecting the foot from injury. Common materials include steel plates and Kevlar midsoles, such as... Figure 1 As shown, the outsole structure of safety shoes is generally a rubber outsole + a middle foam layer + a puncture-resistant midsole. The puncture-resistant midsole is at the top of the outsole structure and is closest to the sole of the foot. Although it protects the foot, the high hardness and toughness of the puncture-resistant outsole result in a poor wearing comfort experience for safety shoes.

[0004] To improve the comfort of safety shoes, the prior art with application number 201310399986.X adjusts the puncture-resistant midsole to be between the rubber outsole and the foam layer. The puncture-resistant midsole used in this prior art is a high-strength polyester fiber tightly woven fabric. When the inventors used the Kevlar puncture-resistant layer to make the outsole structure of the safety shoes according to the disclosed method, they found that the semi-finished outsole after the rubber outsole and the Kevlar puncture-resistant layer were vulcanized together would deform, affecting further molding and the quality of the outsole. Summary of the Invention

[0005] To address the issue of deformation in semi-finished shoe soles after integrated vulcanization of rubber outsoles and Kevlar puncture-resistant midsoles, this invention provides a novel puncture-resistant composite outsole structure.

[0006] The objective of this utility model is achieved in the following manner:

[0007] A novel puncture-resistant composite outsole structure includes a foamed midsole and a rubber outsole, with a Kevlar puncture-resistant layer disposed between the foamed midsole and the rubber outsole. A layer of thermal insulation cotton is bonded to the upper and / or lower surfaces of the Kevlar puncture-resistant layer. The rubber outsole has a thickness of 3-5 mm, the Kevlar puncture-resistant layer has a thickness of 2.3-3.0 mm, the thermal insulation cotton has a thickness of 0.5-1.0 mm, and the foamed midsole has a thickness of 5-8 mm.

[0008] When the foamed midsole is made of EVA elastic material, a layer of heat insulation cotton is bonded to both the upper and lower surfaces of the Kevlar puncture-resistant layer.

[0009] When the foamed midsole is a PU elastic material, a layer of heat insulation cotton is bonded to the lower surface of the Kevlar anti-puncture layer.

[0010] The heat insulation cotton is GMF heat insulation cotton.

[0011] Compared with the prior art, the Kevlar anti-puncture layer is formed by bonding a layer of heat insulation cotton to the lower surface or the upper and lower surfaces of the Kevlar anti-puncture layer, and then vulcanizing the Kevlar anti-puncture layer and the rubber outsole to form a semi-finished sole, and then connecting the semi-finished sole and the foamed layer to form a new anti-puncture combined sole structure. The new sole structure applied to safety shoes overcomes the uncomfortable feeling of the foot bottom caused by hardness and toughness in the original structure, greatly improves the comfort of safety shoes, has good anti-puncture effect, and has the advantages of simple production method, easy operation, high practicability, large batch production, good market prospect, etc. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a schematic diagram of an anti-puncture combined sole structure in the prior art.

[0013] Figure 2 is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0014] The utility model will be further described below in combination with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the utility model, and are not used to limit the scope of the utility model. After reading the content of the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the utility model.

[0015] As shown in Figure 2 A new anti-puncture combined sole structure, comprising a foamed midsole 1 and a rubber outsole 3, a Kevlar anti-puncture layer 2 is arranged between the foamed midsole 1 and the rubber outsole 3, when the foamed midsole is an EVA elastic material, a layer of heat insulation cotton is bonded to the upper and lower surfaces of the Kevlar anti-puncture layer, when the foamed midsole is a PU elastic material, a layer of heat insulation cotton is bonded to the lower surface of the Kevlar anti-puncture layer, the average thickness of the foamed midsole is a=5-8mm, the thickness of the rubber outsole without anti-slip pattern is b=3-5mm, the thickness of the Kevlar anti-puncture layer is 2.3-3.0mm, and the thickness of the heat insulation cotton is 0.5-1.0mm (the total thickness of the Kevlar anti-puncture layer and the heat insulation cotton is c).

[0016] The heat insulation cotton is GMF heat insulation cotton. The GMF heat insulation cotton is a flexible sheet heat insulation material combined by porous vacuum silica stone material and high polymer skeleton material through a vacuum cross-linking gasification high-pressure drying preparation process. The GMF heat insulation cotton is a porous structure, has a uniform surface, and has a lowest heat conductivity coefficient of 0.014-0.017 W / (m·K), has super-high heat insulation performance, and also has excellent properties such as hydrophobicity, flame retardation, insulation, environmental protection, etc. The GMF heat insulation cotton can be directly die-cut, edge-wrapped, and compounded with double-sided adhesive film, meets the environmental protection ROSH instruction, and has a use temperature of -40-200 DEG C.

[0017] The production method of the new anti-puncture combined sole structure comprises the following steps:

[0018] (1) According to the use requirements of the rubber outsole, rubber outsole rubber compound is mixed, and the mixed rubber compound is cut into outsole rubber sheets according to the shape of the mold for standby;

[0019] (2) The Kevlar anti-puncture layer and the heat insulation cotton are cut according to the size of the outsole, and the size of the Kevlar anti-puncture layer and the heat insulation cotton is slightly smaller than the size of the rubber outsole, generally 3-4 mm smaller than the size of the rubber outsole;

[0020] After bonding and forming, when the foamed midsole is an EVA elastic material, a layer of heat insulation cotton is bonded on the upper and lower surfaces of the Kevlar anti-puncture layer; when the foamed midsole is a PU elastic material, a layer of heat insulation cotton is bonded on the lower surface of the Kevlar anti-puncture layer;

[0021] (3) Adjust the vulcanization parameters, the vulcanization temperature is 160±5 DEG C, and the time is 400±10 s;

[0022] (4) After the vulcanization parameters meet the requirements of step (3), open the vulcanization mold, place the cut outsole rubber sheet in the mold, and place the material bonded and formed in step (2) above the outsole rubber sheet, close the mold, complete the integral molding vulcanization process through rubber cross-linking reaction;

[0023] (5) Take out the semi-finished sole after vulcanization and forming, place it in the mold, pour PU elastic material, close the mold, and naturally cool to form a new anti-puncture combined sole structure; or place the semi-finished sole in the mold, place a foamed EVA blank above it, heat and press after closing the mold, bond the foamed EVA with the semi-finished sole, and then water-cool to form a new anti-puncture combined sole structure.

[0024] The foamed EVA blank is prepared according to the use requirements of the EVA foamed midsole, the required raw materials are put into an internal mixer to prepare a foamed EVA base material, then granulated, and once foamed and formed in an EVA midsole mold at 175-185 DEG C to form a foamed EVA blank, and then cooled for standby.

[0025] The preparation of the rubber outsole and the foamed EVA blank, the temperature, pressure, water cooling and other process conditions required for the secondary foaming of EVA all belong to mature processes in the prior art and are not within the protection scope of the utility model.

[0026] The novel anti-puncture combined outsole structure prepared by the utility model can reach 1480-1500N in puncture resistance according to / T12017-1989, which is greater than 1100N in the national standard of anti-puncture safety shoes.

[0027] The novel anti-puncture combined outsole structure prepared by the production method disclosed by the utility model is applied to safety shoes, overcomes the uncomfortable feeling of the foot bottom in the original structure due to hardness and toughness, greatly improves the wearing comfort of the shoes, has good anti-puncture effect, the production method is simple, easy to operate, high in practicality, suitable for mass production, has good market prospect.

[0028] The above is only the preferred embodiment of the utility model, and it should be pointed out that for those skilled in the art, without departing from the overall concept of the utility model, a number of changes and improvements can be made, which should also be considered as the protection scope of the utility model.

Claims

1. A novel puncture resistant combination outsole structure characterized by: The invention discloses a kind of shoes, including foamed midsole and rubber outsole, foamed midsole and rubber outsole are provided with kevlar puncture-resistant layer, the upper surface and / or lower surface of kevlar puncture-resistant layer is bonded with a layer of heat insulation cotton, the thickness of rubber outsole is 3-5mm, the thickness of kevlar puncture-resistant layer is 2.3-3.0mm, the thickness of heat insulation cotton is 0.5-1.0mm, the thickness of foamed midsole is 5-8mm.

2. The new puncture resistant combination sole structure according to claim 1, wherein: When foamed midsole is EVA elastic material, the upper and lower surfaces of kevlar puncture-resistant layer are bonded with a layer of heat insulation cotton.

3. The new puncture resistant combination sole structure according to claim 1, wherein: When foamed midsole is PU elastic material, the lower surface of kevlar puncture-resistant layer is bonded with a layer of heat insulation cotton.

4. The new puncture resistant combination sole structure according to claim 1, wherein: The heat insulation cotton is GMF heat insulation cotton.

Images